The backgrounds are amazing but can be pretty taxing on performance, specially on lower end devices. I am suggesting an option to disable animated backgrounds to make them static, similar to how in 2nd Encore you can switch between 3D and 2D backgrounds. One example that could benefit greatly from this is the train stage, it has a lot of moving elements and can damage performance. With this maybe every level can run as well as the Annie stage does, and could be very helpful.